/**
 * @Author ZhangGJ
 * @Date 2021/01/26 21:20
 */

#include <stdio.h>
#include <stdbool.h>

int main(void) {
    bool digit_seen[10] = {false};
    int digit;
    long n;

    printf("Enter a number: ");
    scanf("%ld", &n);

    while (n > 0) {
        digit = n % 10;
        if (digit_seen[digit]) {
            break;
        }
        digit_seen[digit] = true;
        n /= 10;
    }

    if (n > 0) {
        printf("Repeated digit\n");
    } else {
        printf("No repeated digit\n");
    }
    return 0;
}
